We full time and have added a freezer about the size of a dorm fridge in our toy hauler . When underway we run it off an inverter and have not had any problems . Circumstances this week caused us to dry camp for three days with no way to charge batteries , After 68 hours the inverter shut its self off as it is supposed to do when voltage gets real low .Freezer was still at 18 degrees when we got electric back . The silly thing is , I have a Honda 3,000 and a Honda 2,000 sitting in the barn 200 miles away ! Maybe I learned a lesson ?